A shield of mercy functions as a +1 heavy steel shield and also allows you to channel your destructive power into healing. You can expend a smite attempt (such as from a paladin’s smite evil class feature or the granted power of the Destruction domain) to heal a creature by touch. The touched creature is healed of a number of points of damage equal to the extra damage that you would have dealt with the smite attack. For example, a 10th-level paladin could expend one use of her smite evil ability to heal 10 points of damage.

If you also wear a magic item that grants an enhancement bonus to your Wisdom score, you add the item’s bonus to the amount of damage healed by the shield of mercy. For example, if the 10th level paladin described above also wore a Periapt of Wisdom +2, each use of smite evil she expended would heal 12 points of damage.